Separable fastener



Patented Aug. 9, 1921.

F. S. CARR. SEPARABLE FASTENER.

APPLICATION FILED IAN. 161920.

y 535mm! vio , FREDv s. Acana, or Nuvi/"Ton, MASSACHUSETTS Assrenoa To CARR rasTENER v y COMPANY, or CAMBRIDGE, iviassA-CriUsETTs, "A CORPORATION or MAINE.

sErARaBLE- FASTENER lApplication filed January 16, 1920. Serial No. 351,768.

To all whom t may concern.'

.Be it known that T, Finn) S. CARR, a citizen of the United States, and a residentvof Newton, in the county of Middlesex and Commonwealth of Massachusetts, have invented an Improvement in Separable Fasteners, of which the following description, in connection with the accompanying draw# ings, is a specification, like characters. on the drawings representing likeV parts. ,v

Thisy inventiony pertains to improvements in separable fasteners.- Y

Itis among the objects vof the invention tonprovide a separableV fastener of the three-` side lock type, adapted to `be separated by relative tipping movement `of stud and socket in a. predetermined direction only,

and so constructed that, while separation may easily be effected by tipping movment in the desired direction produced by a pull, av corresponding tippingmovementin the opposite direction actuated byV a push will i not lseparate the stud and socket. This feai ithe neck 6 and the head 5 beingpreferablyV ture is particularlyy useful in connection with curtainfasteners wherein relative tipping movement may be imparted to stud and socket by reason of the blowing of the wind against the body of the curtain in such a way as to produce by a resolution of forces relative movement of stud and socket analogous to that which would be produced by a pull tending to tip the stud and socket exerted on that side of the stud opposite the body of the curtain.

In the drawings wherein I have elected to show a preferred form of one illustrative embodiment of -niy invention Figure 1 is a front elevation of a curtain fastener;

Fig. 2 is a section on the line 2-2 of Fig. l;

Fig. 3 is a section on the same plane as that of Fig. 2, but shows the stud and socket in the relative position which they preferably attain when sufliciently great pressure is exerted in an inward direction against the body of the curtain, by wind strain or otherwise; and

Fig. 4 is a rear elevation of the socket. Referring to the preferred form of my invention shown in the drawings, I preferably provide a stud having a head 5, a neck 6 and shank portion?, the shoulder between sloping and the shoulder between the Il @ck 6 andthe shank portion 7 also being sloping, for reasons/hereinafter described. ,y Cooperating with the stud, 1 provide a Specification of Letters Patent. Patented A1103 9,1921.`

socket which preferably includes an unyielding jaw 8 adapted` to engage the neck ofthe stud at one side thereof, herein shown as theV top, and a yielding j aw 9 adapted to engage the. opposite ,side ofthe neck of the stud, herein shown as the bottoni-thereof.- .I also preferably provide `opposite the unyielding jaw 8 a'support 10 engaging the -shank porT tion 7 of the stud at apoint opposite the unyielding aw '8; this support 10 preferably i extending a considerable distance around"- the bottom of the stud to vprovide av relatively extended bearing.' surface. Y I.

In the preferred form of my invention,

I have shown the unyielding jawr 8jtlie y yielding jaw 9 and the: supportl 10,` as located on-that sidefofthe curtain v11- from perforations of the curtain for passage of' the head 'of the studv maybe avoided. The

stud-engaging parts, V`hereinbefore described,

`provide the lunyielding jaw 8 on a separate plate 13, which may form the closure for the socket.

I prefer tosecure the socket to the curtain 11 by prongs 14 projecting forwardly from the casing 12 and clenched over a clench-plate l15 by being turned against an anvil'lG.

The studV and socket hereinbefore described are adapted to be separated by tipping movement produced by an outward pull `on the bottom of the socket. The stud and socket cannot be separated by relative tipping movement in any other direction because of the engagement of the unyielding jaw 8, and also preferably because the aperture in the casing 12 through which the stud passes is shaped to permit tipping movement only in a direction as above dened.

'75 Ywhich Vthe stud enters so that, if desired,

I prefer, as shown, to form the Y Tipping movement in the direction reinward push on the top of the socket such as might be produced by the wind blowing the curtain above the socket in a direction to produce the tipping'movement shown in Fig. 3. This may be effected in any suitable way, but l prefer to produce this ren sult by providing a decided slope at the shoulder between the neck 6 and the shank 7 of the stud, and by providing a relatively smooth neck-engaging surface Von the unyielding j aw 8, so that the jaw 8 can ride up the incline to the position shown in Fig. 3, at which point the stud and socket will be locked together against further tipping movement so that separation of stud and socket will not be effected regardless of any strain in the direction of the arrow shown in Fig. l/Vhen, however, the stud and sock-et are in the relative position shown in F ig. 2 and an outward strain is applied in the direction of the arrow shown in Fig. 2, the fixed j aw 8 will remain in the neck of the stud and, by reason of the yielding of the spring 9 as it rides up the surface between the neck 6 and the head 5, separation of stud and socket may be readily effected.

While l have shown and described a preferred form of one embodiment of my invention, it will be understood that changes involving omission, substitution, alteration and reversal of parts, and even changes in the mode of operation, may be made without departing 'from the scope of my invention, which is best delined in the following claims.

Claims: Y

l. A separable fastener comprising, in coi'nbination, a stud having a head, a shank portion, and a neck between said head and shank portion, a socket including a ixed jaw `and a yielding' engaging opposite sides 2. A separable fastener comprising, in f combination, a stud having a head and a neek, a shank portion, asloping shoulder between said neck and saidv shank portion, a socket including a fixed jaw and a spring 'aw enoanjn oynosite sides of the neck of' h b g L said stud, said stud and socket when engaged separable only when an outward pull is exerted on that side of the socket where thc spring` jaw is located, thereby to tip the stud and socket one relative to the other by a rocking movement about said fixed Yjaw as anY axis, said fixed jaw adapted to ride up said sloping shoulder and to wedge the stud and socket into engagement one with the other when an inwardly directed push is exerted on that side of the socket where the fixed jaw is located.

ln testimony whereoitI I have signed my name to this specification.

FRED S. CARR. 

